This would be a first for me but I don't approve of this, it's not hard to watch the mailing list/irc and even if you get missing files in the footprint you can do prt-get deptree foo to see what is missing and install those manually. Crux is for experienced users, surely if we remove a dependency or not install one it's because we want it that way. If not we add it manually.

It would be good if prt-get prints some warning messages when updating packages with changed dependencies, like comparing /var/lib/pkg/prt-get.cache with the port tree, to find out if there are any dependency changes. This operation doesn't need to be recursive, so it won't hurt much performance.